Question

The foreman in the pressworking section comes to you with the problem of a blanking operation that is producing parts with excessive burrs. (a) What are the possible reasons for the burrs, and (b) what can be done to correct the condition?

Answer 1

Answer:

There are many reasons can be happened behind it. But some specific reasons can be related to the problem

A) Reason for excessive burrs areas :  

• The clearance between punch and die is too large for the material and stock thickness

• The punch and die cutting edges are worn which has the same effect as the excessive clearance.

B) To correct the problem

• To check the problem in punch and die edge cutting

• If they are reground the faces to sharpen the cutting edges, If the die is not worn, Measure the punch and die clearance to see if it equals the recommended value.  

• If not the die maker must re-fabricate the punch or die.